The internet is changing the world. Roughly two billion of us already have access to it and the number is growing exponentially. It has an enormous impact on the way we gather information, consume and socialise - but has it changed the way we think? Clay Shirky is an influential writer on the internet age. His basic proposition being that the internet will unleash human potential as never before. But what happens if it simply magnifies our flaws? Presented by Stephen Sackur.